P1109
BARO Sensor Circuit Out of Range High
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)
Symptoms
- Check Engine light comes on
- Deterioration in acceleration dynamics
- Increased fuel consumption
- Unstable engine operation at idle
- Problems starting the engine in some cases
Causes
- Faulty atmospheric pressure sensor (BARO)
- Open or short circuit in the sensor circuit
- Poor contact in the sensor connector
- Corrosion or oxidation of contacts
- Engine control unit (ECU) malfunction
How to Fix
- Check the integrity of the wiring and connections of the BARO sensor
- Clean sensor connector contacts
- Check the resistance and output voltage of the sensor
- Replace the faulty BARO sensor if necessary
- Check and replace wiring harness if necessary